Narrow component prop types, remove unused props and dead code (#2838)

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>

shared/ui/DropdownDays.astro

@@ -2,10 +2,10 @@
 interface Props {
   id?: string
   label?: string
-  value?: string
 }
 
-const { id, label = 'Select time range', value = 'Last 7 days' } = Astro.props
+const { id, label = 'Select time range' } = Astro.props
+const value = 'Last 7 days'
 ---
 
 <div class="dropdown">